Product Reviews > Health & Beauty > Magnesium Supplements
Best Magnesium Supplement in the UK
"Life-changing" say UK users - Discover why triple-action formula delivers results whilst others disappoint
Emma Richardson, MSc. RNutr,
Last updated: 04 June, 2025
EDITORIAL NOTICE: We review Magnesium supplements sold in the UK. We test them based on science, quality, and real customer results. See our guidelines below.
Jane, a 45-year-old marketing director from London, was at her breaking point.
“I was constantly exhausted, lying awake at 3 AM staring at the ceiling, my mind racing while my body felt like lead. The leg cramps would hit just as I’d finally drift off. By morning, I felt like I’d been hit by a bus – and this was my life, every single day.”
Sound familiar?
Jane tried everything: prescription sleeping pills (left her groggy), herbal remedies (did nothing), meditation apps, new mattresses, even giving up coffee. Nothing worked.
Then she discovered something that changed everything – a mineral so fundamental to human health that without it, your body literally cannot function properly.
Within just 4 days, Jane was sleeping through the night. After two weeks? “I wake up actually refreshed. My energy is back. The leg cramps are gone. I feel like myself again – actually, I feel better than I have in years.”
The Hidden Epidemic Keeping You "Wired and Tired"
If you’re reading this at 2 AM because you can’t sleep, or struggling through another day of bone-deep exhaustion despite sleeping 8 hours, you’re not alone.
Thousands of successful UK professionals aged over 35 are trapped in the same nightmare:
- Constant exhaustion that coffee can’t fix
- “Wired and tired” – exhausted but unable to relax
- Tossing and turning for hours every night
- Leg cramps that jolt you awake
- Brain fog that makes you feel half-present
- Waking up exhausted no matter how long you sleep
Here’s what your doctor probably hasn’t told you: These aren’t separate problems. They’re all symptoms of the same hidden deficiency.
Modern science has confirmed that magnesium is absolutely critical for:
- 300+ biochemical reactions in your body
- Deep, restorative sleep (it literally helps your brain waves slow down)
- Energy production at the cellular level
- Muscle relaxation and cramp prevention
- Nervous system regulation (goodbye racing thoughts)
- Stress hormone management
Why You're Almost Certainly Deficient
Here’s the shocking truth: Modern life is literally draining the magnesium from your body.
Every time you:
- Feel stressed (work deadlines, family pressures)
- Drink coffee or alcohol
- Exercise intensely
- Take certain medications
- Eat processed foods
…you’re depleting your magnesium stores.
Making matters worse, today’s vegetables contain 25% less magnesium than they did in 1940 due to soil depletion.
Even if you eat perfectly, you’re likely not getting enough. The result? Your body starts breaking down.
“I was struggling with muscle cramps, restless sleep, and low energy levels, but since I started taking magnesium supplement, I’ve noticed an improvement in all those areas” Michael, 48
The 3 Types of Magnesium That Actually Work
Not all magnesium is created equal. In fact, most supplements use cheap forms your body can barely absorb (hello, magnesium oxide).
After analysing hundreds of studies and thousands of customer experiences, we’ve identified the only three forms that deliver real results:
Magnesium Glycinate – The Sleep Transformer
- Crosses the blood-brain barrier easily
- Calms racing thoughts and anxiety
- Promotes deep, restorative sleep
- Gentle on the stomach (no emergency bathroom trips)
“I’m sleeping much better since taking these and the duration of deep sleep has tripled from 30 mins to an hour and a half” – David, 41
Magnesium Citrate – The Energy Booster
- Highest absorption rate
- Rapidly replenishes depleted stores
- Supports cellular energy production
- Helps regulate digestive health
“Stopped me over sleeping and feeling tired in the morning” – Emma, 39
Magnesium Malate – The Muscle Soother
- Specifically targets muscle tissue
- Reduces cramps and restless legs
- Supports exercise recovery
- Enhances overall vitality
“Got cramps on my both legs early morning just before I got out of bed… I do sleep better and wake up with no problems at all!!” – James, 55
The Synergy Secret: Why Most Supplements Fail
Here’s what the £5 bottles at Boots won’t tell you: Taking just one form of magnesium is like trying to fill a bucket with holes in it. Each form serves a different purpose. Miss one, and you’re leaving critical benefits on the table.
But there’s more. Research shows that certain nutrients dramatically enhance magnesium absorption:
- Vitamin D3: Works synergistically with magnesium (and Vitamin D deficiency is common in winter)
- Zinc: Increases magnesium uptake at the cellular level
Without these co-factors, you’re literally flushing supplements down the toilet.
We Tested the UK's Top Magnesium Brands
Our team analysed the 5 best-selling magnesium supplements in the UK, evaluating them on:
- Bioavailable forms (not cheap oxide)
- Optimal dosing (200-225mg elemental magnesium)
- Essential co-factors (D3 and Zinc)
- Manufacturing standards (UK-made preferred)
- Customer experiences (real results, not just claims)
- Value and guarantee (confidence in their product)
Each supplement was rigorously evaluated across all criteria. Here are our findings:
Our Analysis: The UK’s Top 5 Magnesium Supplements
PROS
- Made in the UK
- 3 forms of Magnesium
- With Vitmin D3 & Zinc
- 225 mg of Elemental Magnesium per serving
- Vegan Friendly
- Free UK Delivery
- 30 Day Money Back Guarantee
CONS
- Only Available Online
- Available in the UK only
The Bottom Line
Among the top magnesium supplements we’ve reviewed, Nutracene Magnesium Complex stands out as a leader in both quality and comprehensive formulation.
Each serving provides a powerful 225 mg dose of elemental magnesium from three highly bioavailable forms, including Magnesium Glycinate, Magnesium Malate, and Magnesium Citrate. This multi-form approach ensures optimal absorption and targets different bodily functions – glycinate for relaxation and sleep, malate for energy production, and citrate for general bioavailability.
What sets Nutracene apart is its synergistic formula enhancement. The supplement includes Zinc and Vitamin D3, which work together with magnesium to improve absorption and maximize effectiveness. This combination is backed by clinical research showing that these nutrients work better together than in isolation.
Manufactured in the UK to GMP standards, Nutracene delivers a pure, high-potency magnesium supplement with no unnecessary fillers or artificial additives. The capsules are easy to swallow and the dosing is convenient at just 2 capsules daily.
Plus, with a 30-day money-back guarantee, you can try it risk-free and experience the benefits of proper magnesium supplementation firsthand.
* Rankings and results are based on personal opinions and may not represent typical user experiences. For more information, please refer to the official product website.
Magnesium Glycinate
by Pure Encapsulations
TOTAL RANKING
B+
OVERALL GRADE
PROS
- Reasonably Priced
- Vegan Friendly
- Gentle on the Stomach
CONS
- Only One Form of Magnesium
- No Zinc or Vitamin D3
- Modest dosage of 120mg
The Bottom Line
Pure Encapsulations’ Magnesium (Glycinate) is a simple, clean supplement that focuses on providing one of the most bioavailable forms of magnesium available. Magnesium glycinate is especially popular because it’s gentle on the stomach and less likely to cause laxative effects than cheaper forms. It’s a great pick for people looking for support with muscle relaxation, stress, or better sleep, and Pure Encapsulations is known for its no-nonsense, hypoallergenic formulas, which is a big plus for anyone with sensitivities.
That said, this product does stick to the basics. You’re only getting one form of magnesium, so you miss out on the potential benefits of other forms like L-Threonate or Citrate. Also, there are no additional supportive nutrients like Vitamin D3 or Zinc — so while it’s solid for magnesium alone, it doesn’t offer the wider bone and immunity support you’d find in a more complete blend. The dose per capsule is also moderate, so you may need multiple capsules per day to reach your ideal intake.
Overall, Pure Encapsulations Magnesium Glycinate is a good, trustworthy choice if you just want pure magnesium, but for those wanting an all-round supplement for stress, sleep, bones, and immunity, other multi-nutrient formulas may offer more value.
* Results and rankings are based on subjective opinion and do not necessarily reflect typical results from the use of these products. Please visit product website for more information.
3. Magnesium Glycinate
by Naturelo
TOTAL RANKING
B+
OVERALL GRADE
PROS
- Vegan Friendly
- No Artificial Flavours
- 3 Forms of Magnesium
CONS
- No Synergistic ingredients
- Not for high performance needs
The Bottom Line
NATURELO’s Magnesium Complex stands out for taking a whole food-based approach to magnesium. Instead of using just one isolated form, it combines multiple magnesium-rich sources, including magnesium derived from organic vegetables and seeds like spinach, swiss chard, and flaxseed. This gives the supplement a natural feel that appeals to anyone who prefers food-based nutrients over purely synthetic forms.
The inclusion of different magnesium sources means it may be better absorbed. Many people find it helpful for muscle relaxation, stress relief, and sleep support. Plus, NATURELO is known for keeping its formulas non-GMO, vegan-friendly, and free from artificial additives, which is a definite plus if you have sensitivities.
However, while the whole food angle is a nice touch, the actual elemental magnesium dose per serving is fairly modest, so you may need to take multiple capsules daily to reach your desired intake — especially if you have higher needs for sports recovery or sleep issues. Also, unlike more advanced blends, this one doesn’t include Vitamin D3 or Zinc, so you’d need to get those from other supplements if you’re looking for bone strength and immune support.
Overall, NATURELO Magnesium Complex is a good choice for those who want a food-based, gentle magnesium, but for people looking for a higher-dose, all-in-one stress, sleep, and immunity formula, there may be more complete options out there.
* Results and rankings are based on subjective opinion and do not necessarily reflect typical results from the use of these products. Please visit product website for more information.
4. Magnesium Complex
by Vegaverro
TOTAL RANKING
C+
OVERALL GRADE
PROS
- Vegan Friendly Formula
- No Artificial Flavours
- Multiple forms of Magnesium
CONS
- No Added Co-Factors
- No Money Back Guarantee
- Foreign Brand
The Bottom Line
Vegavero’s Magnesium Bisglycinate is a straightforward, vegan-friendly magnesium supplement that focuses on high bioavailability and gentle absorption. Magnesium bisglycinate is widely known for being easy on the stomach, making it a good pick for people who want help with muscle relaxation, stress management, or sleep support without digestive discomfort.
One standout for Vegavero is their clean, plant-based approach. The capsules are 100% vegan, free from GMOs, artificial additives, or allergens, and the brand is known for its commitment to sustainability and transparency. The dose is also decent for everyday magnesium maintenance.
The formula does have Vitamin B, but it is still pretty single-focused, with no additional supportive nutrients like Vitamin D3 or Zinc, which work well alongside magnesium for bone strength, immunity, and overall wellbeing. And as with many magnesium-only products, you may need to take several capsules daily to meet your full intake needs.
Overall, Vegavero® Magnesium Bisglycinate is a clean, vegan option that gets the job done,
* Results and rankings are based on subjective opinion and do not necessarily reflect typical results from the use of these products. Please visit product website for more information.
5. Magnesium Glycinate
by Nutri Advanced
TOTAL RANKING
C+
OVERALL GRADE
PROS
- Vegan Friendly
- Clean Formula
CONS
- Single Magnesium Form
- 500mg per dose
- No Additional Nutrients
The Bottom Line
Nutri Advanced’s Magnesium Glycinate is a solid choice if you’re looking for a highly bioavailable form of magnesium that’s easy on the stomach. Magnesium glycinate is well known for its good absorption and gentle effect on digestion, making this supplement popular for people who want to ease muscle tension, manage stress, or sleep better without the laxative side effects of cheaper magnesium forms.
One of the strengths of Nutri Advanced as a brand is that they’re known for clean formulations with no unnecessary fillers, which is reassuring for anyone with food sensitivities or allergies. The tablets also deliver a decent daily dose, so you won’t need to take too many at once.
However, it’s worth pointing out that this product is single-focused. It only contains magnesium glycinate, so you’re missing out on other forms like citrate or malate that some people like for additional benefits. It also doesn’t include any supportive co-factors which work synergistically with magnesium to support immunity, bones, and general wellbeing. So while it’s a strong performer for pure magnesium needs, it may feel a bit limited for anyone wanting an all-in-one formula.
* Results and rankings are based on subjective opinion and do not necessarily reflect typical results from the use of these products. Please visit product website for more information.
Amongst the top magnesium supplements we’ve reviewed, Nutracene stands out as a leader in both quality and comprehensive support.
Each serving delivers a well-balanced blend of three highly bioavailable forms of magnesium, combined with Zinc and Vitamin D3 for added bone, sleep, and immune benefits.
MADE IN THE UK
FREE UK
DELIVERY
MADE TO GMP
STANDARDS
References:
Magnesium Supplementation and Sleep Quality: Citation: Abbasi, B., Kimiagar, M., Sadeghniiat, K., Shirazi, M. M., Hedayati, M., & Rashidkhani, B. (2012). The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. Journal of Research in Medical Sciences, 17(12), 1161–1169. https://pmc.ncbi.nlm.nih.gov/articles/PMC3703169/
Magnesium Supplementation and Muscle Soreness: Citation: Reno, A. M., Green, M., Killen, L. G., O’Neal, E. K., Pritchett, K., & Hanson, Z. (2022). Effects of magnesium supplementation on muscle soreness and performance. Journal of Strength and Conditioning Research, 36(8), 2198–2203. https://pubmed.ncbi.nlm.nih.gov/33009349/
Magnesium and Sleep Health: Citation: Barbagallo, M., & Dominguez, L. J. (2010). Magnesium and aging. Current Pharmaceutical Design, 16(7), 832–839. https://pubmed.ncbi.nlm.nih.gov/33573164/
Magnesium and Vitamin D Synergy: Citation: Rosanoff, A., Weaver, C. M., & Rude, R. K. (2012). Suboptimal magnesium status in the United States: Are the health consequences underestimated? Nutrition Reviews, 70(3), 153–164. https://pubmed.ncbi.nlm.nih.gov/22364157/
Magnesium and Nervous System Support: Citation: Barbagallo, M., & Dominguez, L. J. (2010). Magnesium and aging. Current Pharmaceutical Design, 16(7), 832–839. https://pubmed.ncbi.nlm.nih.gov/33573164